Improvement in sash-fasteners



2 @te dal @time Je du WALTER K. MARVIN, OF NEWA YORK, N. Y.

Lenen Patent Ne. 83,983, deteez Neeembee 1o, 186s.

IMPROVEMENT IN SASI-I-FASTENERS.

To whom it may concern:

Be it known that I, WALTER K. MARVIN, of New York, in the county andState of New York, have invented certain new and useful Improvements inSash- Fasteners; and I hereby' declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying drawings, in which- Figure l is a plan view of my improvedsash-fastener, with the parts in the position which they occupy when thesash is free.

Figure 2 is a like view of the same, with the parts inl position forcompressing the sash.

Figure 3 is a perspective View of the lower plate of the sash-fastener.

Y Figure d represents a section on the line x y, fig. 2.

Figure 5 is a perspective view of the double cam,l

and its shaft for actuating the compressing-plate or plates of thefastener'.

My inventionV relates to that class of sash-fasteners in which a cam isemployed to compress the sash to be locked or fastened, and it may bestated, in general, to consist- First, in the employment, for thepurpose mentioned, of a double cam or eccentric, or two cams, oreccentrics, mounted upon the same shaft, arranged in such manner thatthe movement of the fastening-device or devices, by which the sash'iscompressed, shall be equal rto the sum of the eccentricities of the twocams.

Second, in the combination, with the two jawed plates of the fastener,of two cams or eccentrics, mounted upon the same shaft, and received,the one in a recess found in the outer plate, the other ina recess inthe inner plate, the said parts being arranged to operate, with relationto each other and to the sash, as hereinafter explained.

'By the use of the devices named, I am enabled to construct the fastenercheaply, to 'obtain, with small .eccentrica a considerable movement ofthe compress- -ing-plates or devices, to bold the sash, when compressed,rmly and with certainty, to cut out but a small portion ofthe plates toallow the free movement of the cams, and to compress either one or bothof the window-sashes, as may be desired. Other obvions advantages arealso possessed by the fastener, ,which need not be recited.

To enable others skilled in the art to understand the nature of myinvention I will now proceed to describe the manner in which the same isor may be carried into effect, by reference to the drawings.

The fastener is composed of two plates, A B, placed one upon the other.The upper plate, B, which rests upon and is supported by the plate A,has formed, on its under side, lugs or ears a,.which t in a longitudinalslot, b, out in the lower plate, and a strip, c, screwed to. the ears afrom the under side .of the plate A (which is recessed, so as toreceivesaidv strip) holds the two plates together, at the same time allowingthe ears a to slide freely in the slot.

The outer end A of the plate A, is bent or formed at iight angles to themain part of the plate, and near the inner end of the plate B, a jaw,B', is' formed or turned up in a similar manner These two plates may belet into the side of the window-frame contiguous to the sash or sashes,so that the exterior plate B will be flush with the face of the jamb.They can be used with either one or two sashes, and to compress eitheror both. For instance,

when but one sash, M, is to be compressed, the outer end A of the plateA need not be formed, but the sash be compressed between the end or jawB of the sliding plate B and the bead o, which separates the two sashes,and so, in a similar manner, the single sashes of railway-car windowsmay be fastened. Or, if it be designed to compress both the upper andlower sashes M N, the two plates A B may be mounted in the window-frame,at the point where the two sashes meet, in such manner as that both willbe capable of a sliding movement, and they maybe moved simultaf neouslyin opposite directions, so that the sash Mwill be compressed between thejawB, which moves up against it, andthe bead o, (which is fixed andimmovable,) and, on the other hand, the outer or upper sash N will becompressed between the bead o and the jaw A' of the plate A, which movesin a direction opposite to the movement of plate B. f

In order to thus operate one or both of the plates A B, I proceed asfollows: l

I make use of a double cam or eccentric, G D, shown in perspective iniig. 5, mounted upon a shaft or pin', F, which is provided with crank,F, or other handle of ordina-ry or suitable construction. The twoeccentrics C D are secured, one above the other, on the shaft, and areso placed that the point of greatest de parture from the axis of theshaft in the one will be diametrically opposite, or thereabonts, the'like point of the other.

.The upper cam or eccentric D is received in a chamber, IZ, inthe outerplate B, and the lower eccentric C is held in a recess, j, formed intheunder plate A.

The pin or lower end of the shaft E passes through the plate A, and isupset, or has a nut attached to its end, so as to hold the cam and shaftin place.

The chamber d is formed, as shown in figs. l and 2.,

having about the same length as the diameter of the eccentiic D, but asomewhat greater breadth, so as to allow the plate B to be 'movedlongitudinally by means of the eccentric without lateral displacement.The chamber f, of the lower eccentric C, is, for a similar reason, of alike form.

But, as the end e of the shaft E is held in the plate A, in which thischamber is situated, it becomes necessary to form, for the reception ofthe pin, a slot, g, in lengthI equal to the eccentrioity of the cam C,so that the shaft or pin e may move towards one or the other end of theslot, according to the position of the eccentric. For instance, if theeccentric be turned so that itsbulging portion will occupy the positionshown in Iig. 1, the pin will be moved to the left-hand'end of the slot;and if, on the contrary, it be turned so as to occupy the positionrepresented in figs. 2 and 3, the pin will be moved to the right-handend of the slot.

Now, let it be supposed that the device is to be used for fastening asingle sash. In this case, the jaw A may be dispensed with, and theplate Acan be immovably attached to the.wi11dow-sash frame, in theposition represented in the drawings. Whenthe cra-nk F ,is in theposition seen in fig.' l, the bulging part 2 of the outer eccentricDwill be turned so as to withdraw the plate orjaw B om the sash M; but,when the eccentric is thus moved, the lower eccentric, whose relation tothe upper one is seen in fig. 5, will also be turned, so as to bring itsprojecting part, V1, to the right of the chamber f, and the pin e andshaft will thus be moved to the opposite end of the slot g consequently,the eccentric D, while drawing back the plate B, will itself be movedback bodily, so that the plate B and its jaw will traverse a distanceequal to the sum of the eccentricities of the two cams.

In like manner, when the position of the crank' is changed to that shownin fig. 2, the cams or eccentrics will be moved forward so as to causethe jaws Bto press the sash firmly against the bead o, and the distancetraversed by the jaw will be equal ,to the eccentricity of the cam D,plus the distance travelledby the pin F e from one end to the other ofthe slot g, which is equal to the. eccentricity of the cam C.

,It will be seen that, by this simple arrangement, the whole device canbe made in compact and neat form, and, as all the parts, excepting theeccentrics, may beA cast, the expense is reduced to a comparativelysmall sum.

As above intimated, the device may be employed for fastening both Sashesof the window. I In lsuch case, it is let into the side of thewindow-frame, in the manner above described, at the point where the twosashes meet,'so that it will always be covered and held in position bythem. The bottom or interior plate Av should not, in this case, beattached immovably to the frame, but should be so arranged that it, aswell as the plate B, may be capable of a sliding movement. When it isdesired, under this arrangement, to operate the fastener, it will beseen-that the jaws A B of the respective plates A B, will each move in adirectionl opposite to that pursued bythe'other, this result being dueto the double eccentric C D. For instance, when the crank is turned fromthe position representedA in Iig. 1 to that shown in figs. 2 and 3, theouter eccentric D will move forward the jaw B against the sash M, whichwill be compressed and held, as above indicated, between the jaw and oneside of the beadv o. At the same time, the eccentric C will draw the jawA of the sliding inner plate A against the sash N, the movement of theplate being allowed by reason of the slot g, and this sash will becompressed and held between the jaw A and the other side of the bead.And so, in releasing the sashes, the movement of the handle F actuatessimultaneously both eccenu tries, and the jaws A B are moved apart andaway from their respective sashes. 1

Having now described my invention, and the ma'nner in which the same isor may be carried into effect,

What I claim, and desire to secure by Letters Pat ent, is-' i 1. Asash-fastener, composed'of one or more sliding jaws, or equivalentcompressing and holding-devices, in combination with a double cam oreccentric, shaft, and handle for actuating said jaw or jaws, substantially as and for the purposes' set forth 2. The'herein-describedconstruction and arrangement of the two jawedI sash-fastening plates,placedI together and recessed to receive the double cam o r eccentric,in the manner specified, the under or lower plate being slotted toreceive the end of the cam-shaft, and to admit of the movement of thesame in the direction of the length of -the said plate, as and for thepurposes set forth.

In testimony'whereof, I have signed my name to` this specification,beforetwo subscribing Witnesses.

v W K. MARVIN.

-Witnesses:

J. B. Norms,

F. E. BRADsHAw.

